.visualizer {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 150px;
    /* 律动条的高度 */
    background-color: rgba(0, 0, 0, 0.1);
    /* 背景透明色 */
}

.bar {
    width: 0.8%;
    /* 更细的律动条 */
    height: 10%;
    /* 初始高度 */
    border-radius: 4px;
    animation: bounce infinite ease-in-out;
}

@keyframes bounce {
    0%, 100% {
        height: 10%;
    }
    50% {
        height: 100%;
    }
}
